The JBO Thread Plug Gauge is a precision inspection tool built for metric fine threads. It helps engineers, machinists, and technicians quickly verify threaded holes to ensure a correct and reliable fit with M15 x 1.5 fasteners.

Designed in a left-hand configuration with 6H tolerance, this gauge delivers consistent, accurate checks for demanding applications. Crafted from hardened steel, it stands up to everyday shop use and resists wear to maintain accuracy over time.

• Go/No-Go design for quick verification: enables fast pass/fail checks of threaded holes, reducing inspection time and preventing mismatched parts.
• Durable hardened steel construction: delivers long service life and steady performance in busy workshop environments, even with frequent handling.
• Left-hand, metric fine-thread compatibility (M15 x 1.5) with 6H specification: precisely matched to the target thread profile, ensuring reliable checks for the intended applications without needing additional tools.

Using the JBO Thread Plug Gauge helps streamline quality control, cut downtime from inspection, and improve overall thread-fit results. Its reliable construction and clear Go/No-Go feedback give you confidence in every measurement and every assembly.